Slab On Grade Fiber Dosage Calculations Spreadsheet
Structural Glass Design Using FEM Method Spreadsheet
Structural Glass Design Using FEM Method Spreadsheet
Structural Glass Design, Based on ASTM E1300 & CAN/CGSB-12.20, using Finite Element Method
Simplified Torsion Analysis For Steel Beams Spreadsheet
Simplified Torsion Analysis For Steel Beams Spreadsheet
This program is a workbook consisting of seven (7) worksheets, described as follows:
- Cantilever – Ecc. Conc. Load Cantilever Beam with Eccentric Concentrated Load at Free End
- Simple Span – Ecc. Conc. Load Simple Span Beam with Eccentric Concentrated Load Applied at Midspan
- Cont. Span – Ecc. Conc. Load Continuous Beam with Eccentric Concentrated Load Applied at All Midspans
- Cantilever – Ecc. Unif. Load Cantilever Beam with Eccentric Uniformly Distributed Load
- Simple Span – Ecc. Unif. Load Simple Span Beam with Eccentric Uniformly Distributed Load
- Cont. Span – Ecc. Unif. Load Continuous Beam with Eccentric Uniformly Distributed Load on All Spans
Program Assumptions and Limitations:
- The simplified torsion analysis used is this program is based on the following reference: USS Steel Design Manual (1981), Chapter 7: Torsion (Figures 7.9 & 7.10, pages 157-169), by: R.L. Brockenbrough & B.G. Johnston
- This program is valid for AISC W, S, M, and HP shapes.
- This program uses the database of member dimensions and section properties from the “AISC Shapes
Database”, Version 3.0 (2001) as well as the AISC 9th Edition (ASD) Manual (1989). - This program follows the procedures and guidelines of the AISC 9th Edition Allowable Stress (ASD) Manual
(1989). - When the value of ‘Lb’ is input = 0 (or actually <= 1.0 ft.), this program will use a value = 1.0 ft.
- This program utilizes an “Allowable Stress Increase Factor” (ASIF) which is a multiplier of any of the calculated allowable stresses Fa, Fbx, and Fby and also the Euler column buckling stresses F’ex and F’ey.
It is used and appears ONLY in the stress ratio calculation. Typically a value of 1.0 may be used. However, a
value of 1.333 may be used for load combinations which include wind or seismic loads. - This program does not calculate or check shear or deflection in member
- This program does not consider deduction for holes in members subjected to tension.
- This program contains numerous “comment boxes” which contain a wide variety of information including
explanations of input or output items, equations used, data tables, etc. (Note: presence of a “comment box”
is denoted by a “red triangle” in the upper right-hand corner of a cell. Merely move the mouse pointer to the
desired cell to view the contents of that particular “comment box”.)
Basic IFC Concepts for Revit users
Table of Contents
Basic IFC Concepts for Revit users
What is IFC and why it is often misunderstood ?
IFC is developed by the buildingSMART association and it is an open standard for the BIM Data exchane.
IFC stands for the Industry foundation classes and it’s not a file format, but actually a semantic schema which defines the way the building related data is described and inherited.
This also means that you can open an IFC file in a simple Texteditor and view its content.
The foundation of IFC are as its name already says the classes, which can describe anything, from a physical object like a wall to abstract concept like a task.
Unfortunately the buildingSMART documentation is very complicated and even scary, because it is actually meant for software developers and not for us mortal Revit users. But the good thing is that you don’t need to get that deep into the theory in order to be able to uses IFC correctly.
Using the IFC documentation
Now let’s have a look you can find and navigate the IFC documentation. You can always access the latest version through the buildingSMART wbsite at https://technical.buildingsmart.org/
As you can see here, IFC4 is the latest development and it is also still being updated.
IFC2x3 is also still often used, but we will stick with IFC4 in this video series, because it is the latest development and 2×3 will become more and more obsolete in the next years.
The best way to find the IFC classes is to select alphabetical listing from the main page sinc IFC4 we can also browse the list in other languages like German, or also in plain English.
Keep in mind that there are a lot more IFC classes that Revit categories for two reasons : the first one is that IFC classs are often more granular and the second one there are many classes which don’t describe physical elements or don’t have a representation in a BIM modeling software like Revit.
Another important point are the predefined property sets – all of the common property sets are mapped automatically when exporting from Revit.
These are very important because they provide the most important element information in a standardized way, and are always structured and named in the same way, no matter from which software the model has been exported.
Same goes for the Quatity sets, which are a special kind of the property sets are used for QTO workflows.
IFC Mapping table in Revit
You can find the mapping table if you go to Revit -> Export Settings -> IFC. This table displays the Revit Categories matched to IFC classes and types.
Note that this table is already filled out by default and it should cover the most common usecases but of course you can always change it if needed.
For this, you will need to copy and paste the exact name from the IFC documentation. Certain Revit categories can also be excluded from the export by simply inserting Not Exported.
This is just the starting point, as in most BIM Projects you will need a more granualar mapping on the object level. The mapping table is saved as a simple textfile and can be easily shared.
If you ever want to revert the default settings or of the mapping table gets messed up by switching between different Revit languages, you can reset it very easily select Load, delete the default file and then hit « Standard ». This will regenerate the file you just deleted with the default, hardcoded settings.
Once we have set up the mapping table, you can launch the Export dialog. Here y ou can select between several already pre-defined setups or also modify these.
Model View Definitions (MDV)
Note that the IFC schema is always combined with a Model View Definition or MVD, which defines a subset of the IFC schema. You can compare an MVD with a 3D view in Revit, where all elements from all phases, all analytical models and calculations are all displayed at the same time.
Model View Definitions help to extract the data in a meaningful way, like a dedicated view of the model.
This is very simplified explanation, but you get the point !
If you use IFC2x3, your choice will usually be the Coordination View 2.0, and for IFC4 the Reference View. These are the default MVDs defined by the buildingSMART for BIM coordination.
Open source Revit IFC
The client of the BIM Manager should always define which IFC version and which MVD is to be used in a project in order to keep this consistent.
Otherwise, just use IFC4 Reference View for your specific discipline. It is important to keep in mind that Autodesk offers an open source Revit Toolset and regularly updates IFC for Revit independantly from Revit Updates.
This way the developers can react much faster and publish updates whenever needed. Therefore you should keep an eye on the version number and check back on apps.autodesk.com for updates.
The easiest way is to just search for revit IFC and you will be presented with the apps for the four most current Revit versions.
Often you will find these updates a week or two earlier on github, where the developers are also publishing the sourcecode, but you can also download the most current installers here.
Current download links for Revit IFC (sidebar): https://bim-me-up.com/
Autodesk App Store: https://apps.autodesk.com
Revit IFC on Github: https://github.com/Autodesk/revit-ifc
Wiki OS with useful tips around openBIM, not only for Revit: https://wiki.osarch.org/index.php?title=Category%3AAutodesk_Revit
Recommended freeware IFC Viewers:
Open IFC Viewer, very fast and supports latest IFC Versions: https://openifcviewer.com/
BIM Vision, powerful viewer, offers additional features for measurement or easy display of classifications: https://bimvision.eu/download/
BIMcollab IFC Viewer, popular viewer, offers direct connection to the BIMcollab platform: https://support.bimcollab.com/en/zoom…%E2%80%8B
FZK Viewer, a bit oldschool, not good with big models, but very accurate display of properties: https://www.iai.kit.edu/1302.php
BlenderBIM: An open source solution for BIM projects?
BlenderBIM: An open source solution for BIM projects?
If you’ve never heard of Blender, it’s only a matter of time! In short, this is freely accessible graphics software, which offers, for example, 3D modeling, simulation, rendering, composition, motion tracking, video editing and animation pipeline functionalities. Created in 1998, it is currently being developed by the Blender Foundation.
Since 2019, the software has been increasingly recognized by companies in the graphics industry, such as Epic Games, Ubisoft or NVIDIA.
What’s new for us:
The BlenderBIM add-on has been around for some time: a specific add-on for Open BIM processes that rely on the BuildingSmart IFC format. It is built by volunteers from the IfcOpenShell project, still in development mode, and constantly evolving.
A new free BIM tool, on software recognized in the world of graphics, and capable of understanding the IFC format. What more ? This is how we focused our attention on the possibilities of this add-on. Is it possible to analyze and modify the data contained in an IFC for example? We summarize everything:
By default, in Blender, collections contain objects that have location, materials, etc. With BlenderBIM, we get several additional properties and functionalities: durability, price, description, globalID, assignment of IFC classes, assignment of attributes and sets of properties to elements, calculations of quantities from the geometry of objects, etc.
Taking into account the ability of this add-on to interpret the IFC format, we therefore asked ourselves the following question: can we think that Blender, technical and cutting-edge software in the field of graphics, can represent a help for stakeholders? of a construction project? Since BlenderBIM allows you to make modifications to an IFC mockup, it can be a solution in a BIM project, especially in the operation-maintenance phase.
In fact, during this phase, we start by using the model of the work executed “as built” in IFC format. In order to identify the functionalities this sotftware can offer to a project today, several tests were carried out on blender 2.92.0 (BlenderBIM addon blender28-bim-210404-py37-win, IFC2x3)
So here are examples of options we can obtain quite simply with the help of BlenderBIM:
- The ability to view IFC models,
- to be able to delete objects (and therefore by extension to divide IFC models by a new save),
- To be able able to move objects, and change the values of their properties
- To be able to add new attributes to objects from Blender.
This is possible: but the IFC models we can export from Blender do not seem to keep the new properties, we consider that this option is still limited to a concrete deployment on a BIM project.
In short, from our point of view, IFC export remains difficult to master, and still seems to limit the possibilities of modifying the IFC format thanks to Blender.
To take a step back, it is also necessary to consider that this is a software whose technique is quite advanced and whose handling represents several years of practice.
However, we are counting on the meteoric progress of the BlenderBIM add-on to allow us to manipulate IFCs with more freedom in the future.
Tank Test Measurements Spreadsheet
Tank Volumes Calculation Spreadsheet
What is the difference between Formwork and Shuttering?
Table of Contents
What is the difference between Formwork and Shuttering?
Introduction
Both formwork and shuttering are used to describe the procedure of making moulds in construction projects. In this process, the concrete gets poured & contained until it gets hardened. To simply put, shuttering formwork is used in concrete construction. While shuttering is a method of foaming moulds using the plywood, formwork creates moulds using a range of materials. Both shuttering and formwork accomplish more or less a similar task.
The primary difference between the two processes is the use of materials to accomplish this constructional job. In many cases, shuttering formwork is described as one form of formwork.
Let’s explore how different these processes are from one another.
Times When Shattering is More Significant than Formwork
Projects ranging in different sizes might require employing both the methods of formwork as well as shattering. The large-scale projects use a range of formwork types. But in almost all cases, shuttering is a popular option, given that the process is more straightforward and allows significant concrete amounts to be used at a single go.
Wall Form Shuttering
Making the right use of plywood to make shuttering becomes more inexpensive, especially when plywood is a recycling medium. Nonetheless, when it is about shuttering & formwork, not all plywood can serve the purpose. A special water-resistant plywood type is used for outdoors.
Wall Formwork
Falsework Support
Both shuttering and formwork will need the falsework support, that too in their various forms. Falsework, as a matter of fact, denotes stabilizers and poles, besides other units used to keep theme in place as the concrete dries.
Not all of these elements are permanent; some come as temporary ones too. So, this means that it can also be taken down right after the concrete sets. For permanent ones, the falsework gets removed as soon as the concrete sets in. This makes shuttering and formwork to remain in place permanently.
Basically, the difference between them is very little. But a definite example of formwork that does not use shuttering is in constructing concrete sidewalk. Rather than using timber for creating the mould, roadform (metal beams) can get used. It features a flat face right against which the concrete setting gets poured to create a clean edge. Connecting grooves and tongues are featured at either end of roadforms.
Modeling and Understanding Floor Diaphragms in STAAD Pro Tutorial
Modeling and Understanding Floor Diaphragms in STAAD Pro Tutorial
In this video, you will learn how to model and understanding floor diaphragms in STAAD.Pro.
00:00 Introduction to Floor Diaphragms
03:08 Modeling Floor Diaphragms in STAAD.Pro
08:51 Modeling Diaphragm Masses in STAAD.Pro
16:12 Printing the Center of Rigidity for Floor Diaphragms in STAAD.Pro
18:46 Specifying the Floor Diaphragm Options in STAAD.Pro
25:55 Printing the Floor Diaphragm Story Stiffness in STAAD.Pro
27:10 Specifying the Seismic Eccentricity for Floor Diaphragms in STAAD.Pro
- Rigid Floor Diaphragm which assumes that the floor is very rigid to experience any in-plane and out-of-plane deformation. The rigid diaphragm action of floors
assumes that the floor is stiff enough to undergo rigid body movement. - Semi Rigid diaphragm which assumes that the floor is very rigid to experience any in-plane deformation but no out-of-plane deformation.
- Flexible diaphragms which assumes that the floor has no rigidity to resist lateral loads.
The rigid floor diaphragm assumption may not be appropriate if a relatively narrow building has closely spaced shear walls (i.e. the shear walls are stiffer than the floor diaphragm). In the case of a low rise building, the floor diaphragms may be flexible compared to the shear walls as in light wood framed construction.
For long narrow buildings with deep beams the rigid floor diaphragm assumption has to be evaluated carefully. The presence of a slab opening for elevators or stairs can weaken the floor diaphragm action.
Wood and metal decks without concrete fills may not be modeled as rigid diaphragms unless the floor system is braced properly. Hence, the use of these options in STAAD.pro requires good engineering decision making based upon the actual site conditions.
Procedure of Designing Water Tank